| Convoluta borealis Sabussow, 1900 | 1900 or earlier | | | |
| Otocelis maris-alba (Sabussow, 1899) | 1899 or earlier | | | |
| Otocelis maris-alba (Sabussow, 1899) | 1900 or earlier | | | |
| Convoluta saliens solowetzkiana Sabussow, 1897 | 1897 or earlier | | | |
| Convoluta sp. Sabussow, 1897 | 1897 or earlier | | | |
| Alaurina composita Metschnikoff, 1861 | 1879 or earlier | | planktonic | |
| Microstomum lineare (Müller, 1773) | 1897 or earlier | | | |
| Microstomum lineare (Müller, 1773) | 1900 or earlier | | | |
| Microstomum septentrionale Sabussow, 1900 | 1900 or earlier | | | under Converven near Dolgaja Guba |
| Provortex sp. (Sabussow, 1900) | 1900 or earlier | | | |
| Graffilla buccinicola Jameson, 1897 | 1913 or earlier | | | material from Prof. Sabussow. in the kidney of Buccinum undatum L. and Neptunea antiqua L. |
| Byrsophlebs graffi Jensen, 1878 | 1913 or earlier | | | beach water. |
| Astrotorhynchus bifidus bifidus (McIntosh, 1874) | 1913 or earlier | | | |
| Proxenetes flabellifer Jensen, 1878 | 1913 or earlier | | | beach water. |
| Proxenetes cochlear cochlear Graff, 1913 | 1913 or earlier | | | |
| Promesostoma marmoratum (Schultze, 1851) | 1913 or earlier | | | very active, in marine and brackish water. |
| Promesostoma marmoratum marmoratum (Schultze, 1851) | 1913 or earlier | | | very active, in marine and brackish water. |
| Promesostoma graffi (Mereschkowsky, 1878) | 1879 or earlier | | | standing freshwater on the Island of Solowetzsk |
| Mesostoma productum (Schmidt, 1848) | 1913 or earlier | | | puddles and lakes of Europe. |
| Bothromesostoma essenii Braun, 1885 | 1913 or earlier | | | |
| Polycystis crocea (Fabricius, 1826) | 1913 or earlier | | | |
| Polycystis groenlandica Levinsen, 1879 | 1913 or earlier | | | |
| Monocelis fusca Örsted, 1843 | 1913 or earlier | | | |
| Monocelis lineata (Müller, 1773) | 1913 or earlier | | | |
| Monocelis viridirostris Sabussow, 1900 | 1900 or earlier | | | |
| Astrotorhynchus bifidus (McIntosh, 1874) | 1932 or earlier | | | |
| Proxenetes cochlear Graff, 1882 | 1932 or earlier | | | |
| Bothromesostoma essenii Braun, 1885 | 1932 or earlier | | | lake. |
| Procerodes lobatus solowetzkianus (Sabussow) Steinbock, 1931 | 1931 or earlier | | | |
| Uteriporus vulgaris Bergendal, 1890 | 1932 or earlier | | | under rocks, nearly everywhere. |
| Aphanostoma diversicolor Ørsted, 1845 | 1905 or earlier | | | Weißes Meer (Insel Solowetsk) |
| Mesostoma productum (Schmidt, 1848) | 1900 or earlier | | | Solowjetsk |
| Mesostoma craci Schmidt, 1858 | 1900 or earlier | | | (Mesostoma sp.) |
| Castrella (Castrella) truncata (Abildgaard, 1789) | 1900 or earlier | | | |